<title>The VOID keyword.</title>
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<center><h1>The VOID keyword.</h1></center>
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<p>
The <b>void</b> <a href="../glossary.html#keyword">keyword</a>
allows us to create functions that either do not require any
parameters or do not return a value.<p>
The following example shows a function that does not return 
a value.
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<pre>

	void Print_Square(int Number);

	main()
	{
	   Print_Square(10);
	   exit(0);
	}
	
	void Print_Square(int Number)
	{
	   printf("%d squared is %d\n",Number, Number*Number);
	}
</pre>
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<p>
The next example shows a function that does not require any parameters:
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<pre>

	#include <stdlib.h>
	#include <time.h>

        int Random(void);

        main()
        {
           printf("A random number is %d\n", Random());
           exit(0);
        }

        int Random(void)
        {
	   srand((unsigned int)time((time_t *)NULL));
	   return( rand());
        }

</pre>
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<h2>Example:</h2>
<img src="../../GRAPHICS/computer.gif">
<a href="../EXAMPLES/pointer_func.c">void example</a>
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<h2>See also:</h2>
<img src="../../GRAPHICS/whiteball.gif">
<a href="../SYNTAX/functions.html">Functions</a>
<a href="../SYNTAX/functions.html#void">Void pointers</a>
<p>
 

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<address><a href="../../address.html">Martin Leslie</a> 
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